All of a sudden from not using my hp 8450 for about a year when I tried to print vacation pictures all of them came out with a green tint overlay on top. I've change all three cartridges, but someone told me that they made be old or expired. I'm going to purchase some more cartridges even though I don't think thats the problem. Has anyone else experienced this problem and or familiar with this problem and how to fix it. Great appreciated.